    // Vue.extend() 一个vue的构造器
    import Vue from 'vue'
    var Car = Vue.extend({
        render(h) {
            h("div", "<div>{{username}}</div>")
        },
        data() {
            return {}
        },
        props: ["list", "username"],
        methods: {
            run() {
                console.log(999)
            }
        },
    })
    var benchi = new Car({
        propsData: {
            list: [1, 2, 3],
            username: "奔驰"
        }
    }).$mount("#ben")
    var bmw = new Car({
        propsData: {
            list: [1, 2, 3],
            username: "宝马"
        }
    }).$mount("#bmw")